Related Clues:
- Closing hour for many NYC bars
- Early hr
- Time in Manhattan when it's midnight in Montana
- Time for semiannual clock changes: Abbr
- When middle watch ends
- Time when clocks are changed
- Common club closing hour
- Clock change hr. (though most do it sooner)
- Closing time for some bars
- D.S.T. starting time ... or a hint to 42-Across
- Clock-changing time, for daylight saving time